Description of Material
ASTM A193 B8MLCuNA is an austenitic stainless steel used throughout the Oil and Gas industry as a cost effective material for general connections including valves, flanges, and fittings where corrosion protection is required.
LoneStar Fasteners Europe offer ASTM A193 B8MLCuNA covering the basic requirements of ASTM A193 but can also offer with supplementary testing meeting additional requirements of the standard or to meet the demands of OEM or international accredited certification bodies.
Forms
| LoneStar Manufacture | ||
| Stud Bolts | ✓ | |
| Studding | ✓ | |
| Hexagon Headed Bolting | ✓ | |
| Socket Headed Bolting | ✓ | |
| Double Ended and Waisted Studs | ✓ | |
| Associated OEM Parts | ✓ |
Sizes and Threads
| LoneStar Manufacture | ||
| Metric Coarse | ✓ | |
| Metric Fine | ✓ | |
| Imperial UNC | ✓ | |
| Imperial 8UN | ✓ | |
| Imperial UNF | ✓ | |
| ACME | ✓ | |
| Metric sizes available | Up to M100 | |
| Imperial sizes available | Up to 6.00″ |
Chemical Composition
| Carbon | 0.02 | % Max |
| Manganese | 1.00 | % Max |
| Phosphorus | 0.030 | % Max |
| Sulphur | 0.010 | % Max |
| Silicon | 0.80 | % Max |
| Chromium | 19.5-20.5 | % |
| Nickel | 17.5-18.5 | % |
| Molybdenum | 6.0-6.5 | % |
| Copper | 0.50-1.00 | % |
| Niobium | – | … |
| Titanium | – | … |
| Vanadium | – | … |
| Aluminium | – | … |
| Nitrogen | 0.18-0.25 | % |
Mechanical Properties
| Class 1 | ||
| Tensile Strength Min, Ksi | 75 | |
| Yield Strength min, 0.2% offset Ksi | 30 | |
| Elongation in min% | 30 | |
| Reduction of Area min% | 50 | |
| Hardness Max | 90 HRB |
Similar or Equivalent Standards
| AISI 25A SMO |
| UNS S3125A |
| DIN 1.7547 |